Refractometer Excellence R4 - Overview - METTLER TOLEDO

Refractometer Excellence R4

Accurate, Intuitive, and Modular.The all-rounder for daily routines: The Excellence R4 refractometer offers fast refractive index measurements in the range from 1.32 to 1.70, with automatic temperature control from 0 to 100°C.

Simple One Click™ Operation

The One Click™ user interface enables users to start a complete workflow with one click including sampling, measuring, rinsing, drying, and SOPs.

User Management

The user management system allows for different level of access to be defined, with each user having their own personalized home screen and language.

Result limits

Measurement limits can be set for color-coded pass/fail information for accepted and rejected samples.

Specifications - Refractometer Excellence R4
Measurement Range nD
1.3200 – 1.7000
Accuracy nD (±)
Repeatability nD (±)
Brix measurement range
0-100 % w/w
Accuracy Brix
0.05 % w/w
Temperature control range
5 °C – 100 °C
Temperature control accuracy (±)
0.1 °C
Measurement scales
Refractive Index, Sugar (Brix and more), Acid/Base, Chemical, Freezing Point, Salt, Others; Up to 30 user-defined concentration tables (can be entered as tables or formulas).
Color-coded result identification
User Management
On-screen help texts
Barcode reader connectivity
Minimum Sample Volume
0.5 mL
Password protection
English, Chinese, German, Spanish, French, Italian, Portuguese, Russian, Polish
Display / User interface
7" display with color touchscreen
PC Software (Optional)
LabX Express and Server

226 x 193 x 208 mm
4.8 kg
Standard Compliance
Dimensions (DxHxW)
226 mm x 193 mm x 208 mm
Material Number(s)

Automatic Temperature Control

The integrated Peltier temperature control quickly heats up or cools down the measurement cell, maintaining the sample reliably at the desired temperature.

Status Light

The status light of the instrument shows if it is ready for a measurement (green), busy (blinking), or waiting for operator action (orange).

Automated Sampling, Rinsing and Drying

Automating workflows saves time, reduces costs and improves safety. The R4 is compatible with a large portfolio of autosamplers including solutions for single or multiple samples, and samples which are solid at room temperature.

Upgradable System

The Excellence R4 can be upgraded to a dedicated automatic multi-parameter system combining density, refractive index, pH, color, titration and more to save time, increase data quality and prevent any alteration of samples between individual analyses.


Material No.: 30474898

Material No.: 21901297

Material No.: 51337021

Material No.: 30474868

Material No.: 30474908

Material No.: 30298362

Material No.: 51192107

Material No.: 51337024

Material No.: 51337197

Material No.: 30125377

Material No.: 51337159

Material No.: 30094673

Material No.: 30094674

Material No.: 51109210

Material No.: 30474909

Material No.: 51190969

Material No.: 11132601

Material No.: 51337023

Material No.: 51191092

Material No.: 51337155

Material No.: 51337166

Material No.: 30097047

Material No.: 51326000

Material No.: 51326400

Material No.: 51327000

Material No.: 51327500

Material No.: 51108149

Material No.: 30474896

Material No.: 30474907

Material No.: 30094297

Material No.: 21901309

Material No.: 51105855


Excellence Refractometer Accessories and Consumables

Material No.: 51338010

Material No.: 51338012

Material No.: 51338013

Material No.: 51338014

Get Your Quote
Refractometer Excellence R4
Thank you for visiting We have tried to optimize your experience while on the site, but we noticed that you are using an older version of a web browser. We would like to let you know that some features on the site may not be available or may not work as nicely as they would on a newer browser version. If you would like to take full advantage of the site, please update your web browser to help improve your experience while browsing